Added the ability to get the names of the options in a set of parsed arguments, and the default val…

tests/lib/args/args_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #library('args_test');
 
 #import('../../../lib/unittest/unittest.dart');
 #import('../../../lib/args/args.dart');
 
 main() {
@@ skipping 363 matching lines @@
         expect(args['define'], equals(['1','2']));
       });
 
       test('returns the default value for multi-valued arguments '
            'if not explicitly set', () {
         var parser = new ArgParser();
         parser.addOption('define', defaultsTo:'0', allowMultiple: true);
         var args = parser.parse(['']);
         expect(args['define'], equals(['0']));
       });
+
+      test('queries the default value', () {

[Bob Nystrom, 2012/08/16 22:22:10]

Move these to a separate group for the getDefault() method, please.

[gram, 2012/08/16 23:20:17]

Done.

+        var parser = new ArgParser();
+        parser.addOption('define', defaultsTo:'0', allowMultiple: true);

[Bob Nystrom, 2012/08/16 22:22:10]

Space after ":".

[gram, 2012/08/16 23:20:17]

Done.

+        expect(parser.getDefault('define'), equals('0'));
+        expect(()=>parser.getDefault('undefine'),

[Bob Nystrom, 2012/08/16 22:22:10]

If it's OK with you, I would make this a separate test:

test('throws if you pass an unknown option name', () { ... {)

[gram, 2012/08/16 23:20:17]

Done.

+            throwsIllegalArgumentException);
+      });
+
+      test('queries the set options', () {

[Bob Nystrom, 2012/08/16 22:22:10]

This should be a separate group for the ".options" getter too.

[gram, 2012/08/16 23:20:17]

Done.

+        var parser = new ArgParser();
+        parser.addFlag('woof', defaultsTo: false);
+        parser.addOption('meow', defaultsTo: 'kitty');
+        var args = parser.parse([]);
+        expect(args.options, hasLength(2));
+      });
     });
 
     group('remaining args', () {
       test('stops parsing args when a non-option-like arg is encountered', () {
         var parser = new ArgParser();
         parser.addFlag('woof');
         parser.addOption('meow');
         parser.addOption('tweet', defaultsTo: 'bird');
 
         var results = parser.parse(['--woof', '--meow', 'v', 'not', 'option']);
@@ skipping 235 matching lines @@
         throw new IllegalArgumentException(
             'Line "$line" does not have enough indentation.');
       }
 
       lines[i] = line.substring(indent);
     }
   }
 
   return Strings.join(lines, '\n');
 }